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Brightwater Treatment Plant

Find information and facts about Brightwater Treatment Plant located near Woodinville, including the treatment process, capital and improvement projects, and visiting the facility and grounds.

March 2024

Birding at a Wastewater Treatment Facility? Brightwater is a great place to learn about birds. Today, rich habitat and waters provide a sanctuary for over 130 bird species, highlighting an extraordinary ecological revival. 

Read about birding at Brightwater in our recent blog article.

Visit Brightwater’s Public Engagement web page to read past emails, newsletters, and blog stories related to Brightwater. Sign up for our emails to stay up to date!

Located just north of Woodinville, Brightwater Treatment Plant (Brightwater) began operating in 2011. It is our newest regional wastewater treatment facility and features an educational and event center, natural areas and hiking trails, and public art. Brightwater treats an average of 36 million gallons of wastewater per day from communities in northeast King County and southeast Snohomish County. The facility is nationally recognized for its award-winning design and its consistent compliance with state and federal discharge limits.


Aerial view of the Brightwater treatment plant, looking north.  

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